19860099 has 16 divisors (see below), whose sum is σ = 31307520. Its totient is φ = 10956960.

The previous prime is 19860079. The next prime is 19860121. The reversal of 19860099 is 99006891.

It is not a de Polignac number, because 19860099 - 2⁵ = 19860067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19860099.

It is not an unprimeable number, because it can be changed into a prime (19860019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15697 + ... + 16914.

It is an arithmetic number, because the mean of its divisors is an integer number (1956720).

Almost surely, 2^19860099 is an apocalyptic number.

19860099 is a deficient number, since it is larger than the sum of its proper divisors (11447421).

19860099 is a wasteful number, since it uses less digits than its factorization.

19860099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32650.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 19860099 is about 4456.4670984985. The cubic root of 19860099 is about 270.8073639057.

The spelling of 19860099 in words is "nineteen million, eight hundred sixty thousand, ninety-nine".